87. Решение задачки по химии №15

150. When setting the titer of a sodium thiosulfate solution, a 1.1780 g sample of the primary standard K2Cr2O7 was dissolved in a 250.00 cm3 volumetric flask. 23.36 cm3 of sodium thiosulfate solution were used to titrate 25.00 cm3 of the sample. Calculate the normal concentration and titer of the sodium thiosulfate solution. What chemical processes underlie this determination? Provide the reaction equation.

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